Raine, James, “The History and Antiquities of North Durham as subdivided into the shires of Norham, Islandshire and Bedlington, which, from the Saxon period until 1844, constituted parcels in the County Palatine of Durham but are now united to the County of Northumberland.” [pub.] John Bowyer Nichols and Son, London and George Andrews, Durham, 1852, p. 338.

This Selby Pedigree shows the direct connection between the Selby family and that of Donaldson. Capt Thomas Donaldson of Cheswick who married Mary Selby, was the grandfather of Eliza Mary Selby Donaldson Selby (who married Henry Gregson of Lowlynn). She did have Selby twice in her name. The first to remember her Selby roots and the second when her father John Strangeways Donaldson benefitted from the will of Henry Collingwood Selby of Holy Island and Swansfield (his uncle and Mother Mary Selby's brother) and added the name of Selby to the end of his name.

His grandson George married Mary, a daughter, of Prideaux Selby of Beal. (This Prideaux (d 1741) was a nephew of Richard, his father being William brother to Richard also of Beal. This Prideaux was the grandfather of Prideaux John Selby the renowned ornithologist of Twizell House,)

Richard’s great grandson, also named Prideaux Selby (1747-1813) became a colonial administrator in the Indian Department in Northern Canada after serving as Captain for the British army. He was the great uncle of Eliza Mary Selby Donaldson. He was married to Elizabeth Alder of London.

It seems he had served in Canada for 20 years and became the administrator of the financial affairs of York on Lake Ontario - later to be named Toronto.

The website below is a blogspot regarding the history of quilting. It reflects on the era of the wars between Canada and America in 1812/1813. York was attacked by American troops in a surprise attack in May 1813. Prideaux was mortally wounded and died of his injuries as per this quote:

"Prideaux was in charge of the Provincial treasury of £3,000 which Elizabeth hid from the invaders. Americans demanded the money; the financial officer was unconscious and couldn't resist and the Provincial government told Elizabeth to hand it over. Prideaux died shortly after the Americans left, unaware that the treasury was gone."

Elizabeth who had subsequently married a soldier called William Darency, inherited c 2,000 acres from her father's estate. link